fights for obama care instead of fighting for jobs for the american people. >> we did work on this, alongside working on jobs, because this is part of making sure that middle class families are secure in this country. >> reporter: president obama on defense, romney challenging his record as both now wait to see if this exchange had any impact on voters. well, we already know it had impact online on twitter. the most tweeted event in u.s. political history. from denver, i'm tracy potts, back to you. >> tracy, thank you. both candidates will be back on the campaign trail today. president obama will stay in denver while mitt romney heads to virginia. and the latest nbc news "wall street journal" poll shows the race in the commonwealth tightening. the president leads his republican rival by 2%. that is within the margin of error. he led there by 4% last month. and in the race, it's even tighter in another battleground state, florida. president obama leads romney by 1%. >>> many virginians are keeping close tabs on this election, especially the ones entering the job market. hundreds of g